Use the new test runner.

test/transformer/a_transformer_rejects_its_config_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS d.file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library pub_tests;
 
 import 'package:scheduled_test/scheduled_test.dart';
 
 import '../descriptor.dart' as d;
 import '../test_pub.dart';
 import '../serve/utils.dart';
 
 const REJECT_CONFIG_TRANSFORMER = """
 import 'dart:async';
 
 import 'package:barback/barback.dart';
 
 class RejectConfigTransformer extends Transformer {
   RejectConfigTransformer.asPlugin(BarbackSettings settings) {
     throw "I hate these settings!";
   }
 
   Future<bool> isPrimary(_) => new Future.value(true);
   Future apply(Transform transform) {}
 }
 """;
 
 main() {
-  initConfig();
-
   withBarbackVersions("any", () {
      integration("a transformer can reject is configuration", () {
        d.dir(appPath, [
          d.pubspec({
            "name": "myapp",
            "transformers": [{"myapp/src/transformer": {'foo': 'bar'}}]
          }),
          d.dir("lib", [d.dir("src", [
            d.file("transformer.dart", REJECT_CONFIG_TRANSFORMER)
          ])])
        ]).create();
 
        createLockFile('myapp', pkg: ['barback']);
 
        var pub = startPubServe();
        pub.stderr.expect(endsWith('Error loading transformer: I hate these '
            'settings!'));
        pub.shouldExit(1);
      });
   });
 }